[kvm-unit-tests PATCH 1/6] libcflat: add PRI(dux)32 format types

[Alex Bennée]

So we can have portable formatting of uint32_t types. However there is
a catch. Different compilers can use legally subtly different types
though so we need to probe the compiler defined intdef.h first.

Signed-off-by: Alex Bennée <alex.bennee at linaro.org>
---
 Makefile       |  1 +
 configure      | 13 +++++++++++++
 lib/libcflat.h |  9 +++++++++
 3 files changed, 23 insertions(+)

diff --git a/Makefile b/Makefile
index a32333b..9822d9a 100644
--- a/Makefile
+++ b/Makefile
@@ -55,6 +55,7 @@ CFLAGS += $(fomit_frame_pointer)
 CFLAGS += $(fno_stack_protector)
 CFLAGS += $(fno_stack_protector_all)
 CFLAGS += $(wno_frame_address)
+CFLAGS += $(if $(U32_LONG_FMT),-D__U32_LONG_FMT__,)
 
 CXXFLAGS += $(CFLAGS)
 
diff --git a/configure b/configure
index 995c8fa..127868c 100755
--- a/configure
+++ b/configure
@@ -109,6 +109,18 @@ if [ -f $testdir/run ]; then
     ln -fs $testdir/run $testdir-run
 fi
 
+# check if uint32_t needs a long format modifier
+cat << EOF > lib_test.c
+#include <inttypes.h>
+EOF
+
+$cross_prefix$cc lib_test.c -E | grep "typedef" | grep "long" | grep "uint32_t" &> /dev/null
+exit=$?
+if [ $exit -eq 0 ]; then
+    u32_long=true
+fi
+rm -f lib_test.c
+
 # check for dependent 32 bit libraries
 if [ "$arch" != "arm" ]; then
 cat << EOF > lib_test.c
@@ -155,4 +167,5 @@ TEST_DIR=$testdir
 FIRMWARE=$firmware
 ENDIAN=$endian
 PRETTY_PRINT_STACKS=$pretty_print_stacks
+U32_LONG_FMT=$u32_long
 EOF
diff --git a/lib/libcflat.h b/lib/libcflat.h
index 380395f..e80fc50 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -58,12 +58,21 @@ typedef _Bool		bool;
 #define true  1
 
 #if __SIZEOF_LONG__ == 8
+#  define __PRI32_PREFIX
 #  define __PRI64_PREFIX	"l"
 #  define __PRIPTR_PREFIX	"l"
 #else
+#if defined(__U32_LONG_FMT__)
+#  define __PRI32_PREFIX        "l"
+#else
+#  define __PRI32_PREFIX
+#endif
 #  define __PRI64_PREFIX	"ll"
 #  define __PRIPTR_PREFIX
 #endif
+#define PRId32  __PRI32_PREFIX	"d"
+#define PRIu32  __PRI32_PREFIX	"u"
+#define PRIx32  __PRI32_PREFIX	"x"
 #define PRId64  __PRI64_PREFIX	"d"
 #define PRIu64  __PRI64_PREFIX	"u"
 #define PRIx64  __PRI64_PREFIX	"x"
-- 
2.11.0